Honda FourTrax Rancher TRX420TM1 2019 Owner's Manual page 118

Maintenance Component
Locations
rear brake light
switch
rear brake pedal
front final gear oil fill cap (Except TRX420TM1)
front final gear oil drain bolt (Except TRX420TM1)
108 Servicing Your Honda
air cleaner
air cleaner housing
drain tube
engine oil filter
front suspension spring
pre-load adjuster
front brake
caliper